WO WO1995006510A1
An apparatus for filtering solid particles from a fluid, for example a gas, at high temperature and high pressure. The apparatus comprises a filter unit assembled from several similar, individual filter elements that, by way of internal connections, form a rigidly, very compact and strong one-piece alike honeycomb shaped filter unit. The apparatus may optionally perform purification of gases. The invention dramatically improves the surface/volume ratio of the filter resulting in more compact filters. The invention further relates to a method for producing a filter unit, said method comprising forming a plurality of elongated tubular filter elements from a filtering material, arranging the elongated filter elements in a coextending relationship, bringing outer wall surfaces of the coextending filter elements in mutual contact along substantially the full length of said elements so as to define a plurality of flow passages for a fluid to be filtered and closing one end of each of the fluid passages, the closed ends being alternately at opposite ends of the filter unit, whereby fluid flowing into the open end of the fluid passages at one end of the filtering unit may flow transversely through filter element walls and out through open ends of fluid passages at the other end of the filter unit.
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